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參數(shù)資料
| 型號(hào)： | TAS3103DBTR |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO38 |
| 封裝： | GREEN, PLASTIC, TSSOP-38 |
| 文件頁(yè)數(shù)： | 5/148頁(yè) |
| 文件大?。?/td> | 1247K |
| 代理商： | TAS3103DBTR |
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The horizontal slope of the transfer curve above the common threshold point does not remain horizontal indefinitely.
At a point 158 dB above the common threshold point (14.7-dB DRC input level), the transfer function has gone from
a boost of 20 dB to a cut of 138 dB. A cut of 138 dB is the maximum cut possible for a 5.23 format gain coefficient
(223
≥ 23 octaves × 6 dB/octave = 138 dB). Thus, at a DRC input level of 14.7 dB, minimum gain saturation has
been reached. For inputs above this saturation point, the DRC-derived gain coefficient remains constant at the
minimum gain value (223), and the transfer function exhibits a 1:1 transfer slope.
3.7.3.4 Example 4—Expansion/Cut/Expansion With Gain Saturation and 32-Bit Dynamic Range
Saturation
The three previous examples restricted the slope factor k to lie in the range k
≥ 1. This example illustrates the transfer
characteristic obtained using a value of k less than 1. For this example it is assumed that the net processing gain
into the DRC is 0 dB. This means that the 8-bit headroom in the 48-bit DAP processing word structure does not contain
data. Since the DRC receives the upper 32 bits of this 48-bit word, data at the DRC is down 48 dB (8 bits x 6 dB/ bit
= 48 dB) with respect to the signal level at the SAP input (TAS3103 input). The transfer function parameters for this
example are given in Table 37. Figure 326 shows the transfer function resulting from entering the I2C coefficient
values given in Table 37.
At the threshold point T2 (70 dB), the transfer function is 100 dB below the 1:1 transfer slope (O2 = 100 dB). For
input levels above T2, the transfer function exhibits a 1:1.4 expansion. For input levels below T2, the transfer function
exhibits a negative slope; for every dB the input decreases, the output increases by 1 dB. At an input level 62 dB below
T2 (132 dB), the transfer curve has risen 62 dB, for a net boost of 124 dB. The transfer curve at this input level is
24 dB above the 1:1 transfer curve. This boost value puts the DRC-derived gain coefficient into gain saturation. For
input levels below 132 dB, the gain coefficient remains constant at maximum gain and the transfer function exhibits
a 1:1 transfer slope, parallel to the 1:1 transfer curve but 24 dB above it.
At T1 (-150 dB), the transfer curve snaps back to the 1:1 transfer curve since O1 = 0 dB. The DRC gain coefficient
is no longer in gain saturation and for inputs below 150 dB, the transfer function exhibits a 1:1.5 expansion. The
change from a 1:1.5 expansion to a 1:1 transfer below 192 dB is the result of 32-bit dynamic range saturation.
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相關(guān)代理商/技術(shù)參數(shù) |
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| TAS3103DBTRG4 | 功能描述:音頻 DSP Digital Audio Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3103EVM | 功能描述:音頻 DSP TAS3103 Eval Mod RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3103IDBT | 功能描述:音頻 DSP Digital Audio Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3103IDBTR | 功能描述:音頻 DSP Digital Audio Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| TAS3103IDBTRG4 | 功能描述:音頻 DSP Digital Audio Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
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